Rectifiers Simulation

CONVERTER SIMULATIONSDC Supply (12V @ 1A)

Presented By FA13-R09-005 Muqadsa Iftikhar

FA13-R09-013 Zunaib Ali FA13-R09-024 Madiha Naeem

DC Supply

Fig. 1(a): AC to AC Transformer followed by Uncontrolled Rectifier

LOAD

+V0-

I0~

ACDC

_

~

ACAC

~

AC Supply

220V ac is converted to desired value of ac and then uncontrolled rectifier is used to convert it to DC.

DC Supply

LoadAC

Supply

+V0-

I0

DCDC

_

~

ACDC

_

_

Fig. 1(b): Uncontrolled Rectifier followed by DC-DC Converter

Uncontrolled rectifiers are used to produce a fixed dc from a fixed ac and at the output of rectifier a dc chopper circuit is used which provide variable dc just by changing the duty cycle

DC Supply

Fig. 1(a): Controlled Rectifier feeding Load

LoadAC

Supply

+V0-

I0~

ACDC

_

Applied voltage can be made variable by using controlled rectifiers which provide variable dc from a fixed ac

DC SupplyTable: Performance Parameters for Rectifier

DC SupplyPerformance Parameters for Rectifier

From formulas mentioned above we can say that:

•The lower the value of RR from unity the lower will be the circuit performance.

•The greater the value of the FF from unity lower will be the circuit performance.

• The lower the value of TUF from unity the lower will be the circuit performance...

•The greater the value of the RF from zero lower will be the circuit performance....

ConversionTransformer followed by Uncontrolled Rectifier

Continuous

powergui

ac input

12.06

Voltage

1 2

Transformer

In1

Specturm

Scope4

Scope2

Scope10

signal rms

RMS4

R

0.999

Power Factor

v+-

O/P Voltage

I nMean

Mean Value1

I nMean

Mean Value

signal

magnitude

angle

Fourier

Irms

I1rms

Theta

DSTF

DSPF

PF

zunaib

EmbeddedMATLAB Function

0.999

Distortion Factor

1

Displacement Factor

D4

D3 D2

D1

1.005

Current

i+ -

Ammeter1

i+ -

Ammeter


0 120 240 360 480 600 7200

20

40

60

80

100

frequency

Har

mon

ics

Mag

nitu

de

Full wave

0 0.005 0.01 0.015 0.02 0.025 0.03 0.0350

5

10

15

20

time

Rec

tifie

r O

utpu

r

Full wave


S.No Performance Parameters Calculated Values

1 Rectification ratio (RR) 0.81

2 Form factor (FF) 1.11

3 Transfer Utilization Factor (TUF) 0.81

4 Ripple Factor (RF) 0.482

Table # 2: Observed values of RR, FF, TUF & RF taken from Matlab command window

ConversionUncontrolled Rectifier followed by DC-DC Chopper

Continuous

powerguiv+

-

Voltage Measurement

Scope3

Scope

274.4

Rectified Voltage

In Mean

Mean Value1

I n Mean

Mean Value

[A]

From1

Diode3

Diode2

Diode1

Diode

Conn1

Conn2

Converter

C3

12.05

Buck Output

AC Voltage Source

Rectifier followed by Chopper


2

Conn2

1

Conn1

t

v+-

Vo V

R

PulseGenerator

In Mean

Mean Value2

L

i+ -

Io

g

CE

IGBT/Diode [A]

Goto1

1.03

Display1

D

Clock

C2C1

A

Chopper


Chopper Output

0 0.005 0.01 0.015 0.02 0.025-2

0

2

4

6

8

10

12

14

16Output of Chopper

time

Rec

tifie

r O

utpu

r


0 120 240 360 480 600 7200

10

20

30

40

50

60

70

80

90

100

frequency

Har

mon

ics

Mag

nitu

de

rectifier with chopper

Output Voltage Equation in case we use Capacitive Filter

Value of Ra

ConversionControlled Rectifier

Continuous

pow ergui

v+-

Voltmg

m

ak

T4

gm

ak

T3

gm

ak

T2

gm

ak

T1

In1

Specturm & other blocks

Scope5

Scope1

Scope

signal rms

RMS4

R

0.9704

Power Factor

I n Mean

Mean Value2

I n Mean

Mean Value1

signal

magnitude

angle

Fourier

Irms

I1rms

Theta

DSTF

DSPF

PF

zunaib

EmbeddedMATLAB Function

0.9762

Distortion Factor

0.994

Displacement Factor

12.4

Converter Output Voltage

1.008

Converter Output Current

i+ -

C1

i+ -

C

AC

3 & 4

1 & 2


0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018-5

0

5

10

15

20

25

time

Rec

tifie

r O

utpu

r

Controlled


0 120 240 360 480 600 7200

20

40

60

80

100

120

frequency

Har

mon

ics

Mag

nitu

de

Controlled Rectification


Performance Parameters Calculated Values

RR 0.5629

FF 1.3328

TUF 0.4944

RF 0.8811

Engineering

Rectifiers Simulation